Apparatus for heating mortar



(No Model.) l

. H. PBTRIE.

APPARATUS FOR HEATING MORTAR.

No. 466,425. Patented Janf, 1892.

A Wf.

IIR Z UNITED STATES PATENT OFFICE.

I-IOMER PETRIE, OF OMAHA, NEBRASKA.

APPARATUS FOR HEATING IVIORTAR.

SPECIFICATION forming part of Letters Patent' No. 166,425, datedd'anua'ry 5, 1892.

Application filed December 23, i890. Serial N0.. 3775,618. (Nomodel.) v Y d To a/ZZ whom it may concern:

Be it known that I, HOMERPETRIE, a citizen o f the United States, residing at Omaha, in the countyof Douglas and State of Nebraska, have invented certain new and useful Improvements in Apparatus for Heating Morta-r; and I hereby declare the following to be a full, clear, and exact description of the same,

reference being had to the accompanying,

parts Wherever they occur.

My invention relates to the construction of heating apparatus for use by brick-layers, plasterers, and others for preventing the freezing of mortar, plaster, and the like while working the same during cold Weather.

My invention consists, generally stated, in the combination, with a box provided with an opening, of a fire-pan in the box for generating heat and provided with openings in its side, and an auxiliary removable draft-funnel forconnecting the opening in the doorwith the openings in the fire-pan.

I will now proceed to describe my invention so that others skilled in the art to which it appertains may apply the same.

In-the drawings, A A indicate uprights or posts, and B B cross-bars, the whole suitably framed together to form a support for the mortar-bed and the closed air-chamber beneath the same. At its upper part this frame is closed on the two oppositesides by boards aomvhich extend above the sill-pieces; at its rear by a board a', which may extend above the sill-piece and be provided With a cap-V piece a2, which will form a rest for hods or other implements, and at its front by-a hinged section or drop-door a3, the box being com pleted by a suitable board bottom b. The box thus formed at `the upper part of the framing constitutes the receptacle for the closed air-chamber C, which may be formed of sheet metal, galvanized sheet metal, heavily 1 tinned sheet metal, or other suitable material flanged above, as at andsupported on or ysecured, to the sills of the frame, so as to leave a suitable air-space c between said box C and the surrounding caseror box a a.

The drop-door a3, before described, and which closes one side of the outer'box or casing of the closed chamber O,has its inner surface protected by a sheet of metal c2, which,

ywhen the door a3 is closed, forms one Wall of the closed chamber C. Through the said door a3 and its covering c2 is an air-port o'r draftopening provided with a slide (Z4 or its equivalent, and in the opposite wall of the box O is a flue-opening D, which may be provided With a suitable damper and which is connected by suitable pipesisho'wn in dotted lines in Fig. l) with an uptake D of any desired height and removable,ifdesired.k This door a3 may be provided with a lock a4. Supported. upon and arranged as a cover forrthe closed chamber O is a receptacle E for the heat-retaining medium, which Vreceptacle constitutes the heat receiving and transmitting bed, and on its under surface this receptacle or cover E may be provided with eyes e, adapted to engage hooks e', attached to the inside Walls of the closed chamber, whereby the removal of the cover from above can be prevented. By means of said hooks e and the lock a4 the closed chamber C may be securedagainst unwarranted entrance, and thus the apparatus, when not in use as a heater, may be employed as a locker to secure the tools of the Workmen. The cover or receptacle E, or, in other Words, the heat receiving and transmitting bed, may, if desired, be a simple pan for the reception of either a liquid or solid heat retaining and transmitting material, but is preferably a closed chamber or shell, Vsuch as shown in the drawings, providedwith a filling-tube E', of

Vconsiderable size and adapted to hold water,

which is the preferable heat retaining and transmitting material, because Water can be used to'thaw Vout and clean off the tools, and said filling-tube E is therefore to be 0f a shape and size which will permit the introduction of such tools as are commonly used by bricklayers and plasterers.

F indicates a lire-pan adapted -to hold a moderate supply of charcoal or its equivalent, said pan provided on its front side With draft- IOO openings fff, and preferably supported on a perforated Iiange f to permit a circulation of air beneath the pan.

For ordinary occasions the diilused ai r-cur rents which enter the closed air-chamber C through the draft-opening in the door a3 will be sufieient to keep alive the coals in the firepan F; but in case it is desired to concentrate the draft and force the tire, an auxiliary draft-funnelG may be used, which funnel has one end adapted to [it the opening in the door a3 and the other to inclose the draft-openin gs fff of the tire-pan F. Then not required to force the fire, the auxiliary draft-funnel G may be removed from the position shown in Fig. 2 of the drawings.

In order to support the mortar on the heat retaining and transmitting bed or cover E without injury thereto, I prefer to arrange on the interior of the cover a series of crossbridging h h, which rests upon the bottom and supports the top or mortar board E.

Then in use as a heater, the mortar to be preserved from freezing is placed on the heat receiving and transmitting bed or cover E, which has been previously filled with water or other suitable liquid or solid heat retaining and transmitting material through the filling-tube E', and if Water is used the liquid is allowed to rise in the tube E to serve as means for thawing out tools. The fire-pan F is filled with ignited charcoal or other snit able live coals inserted in the closed chamber C and the several dainpers properly set to maintain the propel' draft and obtain the requisite heat in the closed chamber C and the bed or cover E. If the draft is not snfiicieut to give the desired heat, the auxiliary draft-funnel G is inserted, as indicatedin Fig. 2, to force the draft through the {ire-pan.

In addition to its use as a mortar-heater, the closed chamber C can be used as a receptacle for lunch-nails when it is desired to heat the workmans lunch, and when the fire has been drawn and the apparatus is not in use as a mortar-heater it can be used as a locker for the reception of the tools of the workmen.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

In a mortar-heater, the combination, with the box having air-openings therein anda slide for said openings, of a [ire-pan provided with openings in its side, and an auxiliary removable draft-funnel forconnecting the opening in the door with the openings in the tirepan, substantially as and for the purposes described.

In testimony whereof I afix my signature, in 6o presence of two witnesses, this 17th day of December, 1890.

HOHER PETRIE. Witnesses:

C. \V. DOUD, J. W. ELLER. 

